/*
 * Copyright 2016 Kejun Xia
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.shipdream.lib.ohos.mvc;

/**
 * StateKeeper saves and restores state of providers. If provider
 */
public interface StateKeeper {
    /**
     * Saves the component's cached instance into this {@link StateKeeper}
     *
     * @param key   key
     * @param value value
     */
    void saveState(String key, Object value);

    /**
     * Restores the component's cached instance into this {@link StateKeeper}
     *
     * @param key  key
     * @param type type
     * @param <T>  T
     * @return T t
     */
    <T> T restoreState(String key, Class<T> type);
}
